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In Pictures: 14 steps to a better, faster Windows ...
4. Replacing the RAM
Once you've found the RAM, press down on the board's edges with a pencil eraser to release the module and remove it. Then line up the contacts of each new module with those on the motherboard. Do it one at a time at a 45-degree angle and press down until the memory board snaps into place.
When you're done, replace the battery, turn the system on and make sure that the new RAM is working properly by right-clicking on the Computer entry in Windows Explorer and clicking on Properties. This brings up the Windows System page. In this case, the system recognizes the new memory, so we're ready to roll.
In Pictures: 14 steps to a better, faster Windows laptop